Much of the fallout surrounding Andy Ruiz Jr's loss to Anthony Joshua on Saturday night has centred around the former's poor physical condition.

Ruiz came into the fight a stone heavier than their first bout back in June, with his size and slow movement falling perfectly into Joshua's game plan.

The Brit was able to dance around the ring and pick the Mexican off at will with a solid jab and some brutal right hands, eventually claiming victory by unanimous decision.

Even when Ruiz attempted to get inside his opponent, he just simply wasn't able to provide the intensity and speed he showed back in June at Madison Square Garden.

In the aftermath of the fight, Ruiz has stated that he was ill-prepared, claiming that three months of partying after becoming heavyweight champion on the world took its toll.

While his admission was honest, it's not the kind of attitude you expect from a professional boxer.

And Paulie Malignaggi has absolutely ripped into Ruiz, labelling the 29-year-old a 'fat tub of s**t'.

"Part of the reason he was flustered wasn't just because of [AJ's] movement," he told Fight Hub TV. "It was also because he came in like a fat tub of s*** and he ruined his chances of closing the gap the right way.

"Do you wanna be great or do you wanna just eat?"

Paulie is not a happy man! However, he did reserve praise for Joshua's commanding and disciplined performance out in Saudi Arabia.

"You have to give credit to AJ - their game plan was smart, the game plan was the right game plan," he added. "But the confidence missing was almost forgivable because he was knocked out six months ago by this guy.

"So he was slanting more towards safety first than slanting more towards winning and trying to execute in a manner where he looks good. I think it was more of a win here, look good the next time. And it's almost forgivable because you have to give him credit for going after a rematch right away.

"And you also have to keep in mind - for everybody criticizing this guy right now - how many of you picked him to lose the rematch? You know you're out there.

"A lot of you picked him to lose the rematch so you can't now say that 'oh he won but I don't think he did this good, I don't think he did that good' - no, he won! He already proved you wrong just by winning."

Joshua's delivered a punch-perfect display in Diriyah, but he was helped massively by Ruiz's negligent preparation.

Against a fully-prepared Deontay Wilder, Tyson Fury or Oleksandr Usyk, the Watford fighter will certainly not find the going as easy.